History's Greatest Unsolved Crimes

Nothing haunts the mind and stirs the imagination like a real-life whodunit. Gory details, large sums of money, or sexual overtimes spark the public's interest, while authorities struggle to crack the case. While the crimes highlighted in this slideshow are just a sampling of history's unsolved crimes, they certainly accent how difficult a case can be.

A maid who cleaned the home of former New England Patriots player Aaron Hernandez has testified at his murder trial that she saw him "messing with" the security camera in his basement the day after the killing.